Rirbon trimming method



p 3- v. MILSTEIN 2,329,639

RIBBON TRIMMING METHOD Filed Aug. 21, 1940 3 Sheets-Shea 1 INVENTOR:

ATTORNEY Sept. 14, 1943. v. MILSTE'IN RIBBON TRIMMING METHOD 5 Sheets-Sheet 2 Filed Aug. 21, 1940 ATTORNEY Sept. 14, 1943. v. MILSTEIN 2,329,639

RIBBON TRIMMING METHOD Filed Aug. 21, 1940 3 Sheets-Sheet 3 I 50 I 35 40 3 5 .35 B: a

I. ll 35 30 ,3;

INVENTOR W'clor N l'lstez'm ATTORNEY Patented Sept. 14, 1943 agazaess .BIMMING-METHQD 1 victpr ltfiistein, New Yo rk; Y-M I I Appncanonnmst 21 940,; Serial1N This. invention..relatesijto a. ribbon .trirnming ethod. qs' T e Object. of.- tlhlS'..iD;VfifltlO;l'-l. is, o:.provide: a novel and improved, method JfOI: or

I decorating laces, ribbons; tapes and; fabrics; of

ll. k nds; with-loose ribbon p y. stitchedronjribbon,iif:-desired.. Y

Ijo; carryout these objects; I;. have. modified the constrn andv with remand: the modeot. operation, and have otherwise equipped; a. sewing lma'chine-of the-double needle, double thread1;,thmwer. type, v

as I. now illustrate and; describe; asq-a meansnfor practicing; the teachings; efthis; invention.

' In the accompanying drawings formingxjn'art of this application, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 is the rear view of a sewing machine of the double needle, double thread thrower type, modified in construction and in mode of opera- 'tion and otherwise equipped to practice my Fig. 7 is a fragmentary front view of the thread thrower fingers in one of their rest positions with respect to theneedles of the machine.

Fig. 8 is a similar View showing the other rest position of. said fingers after they had been shifted so that the threads they carry are made to change their paths with respect to the lines of stitching effected by the needles of the machine.

In the drawings, the numerals 20 and 2!, are the needles of a machine of the type mentioned, which machine indicated generally by the numeral 22, is provided with the usual thread throw fingers 23 and 24, extending respectively from the members 25 and 26 which are in geared relation. The member 26, is secured on the Vertical, axially rotatable shaft 21, as is an arm 28, while the member 25 is rotatably carried on the vertical post 29, of the pressure foot 39. At

a lace 34, as an example; the feeding.- :otxboth the. ribbon 32'and thela'ce 511i, being. efieotedl -by :actiomof thegripfeederfi; I

Threads 36.:and 3]: for the: neediesafltz and. 241:, are: guided: thereto through eyes 33 andi its-re .spectively, whilena" thread; or: gimp; M;- for the throw finger 23, is. guidedithrough eye's Mend 42, before enteringeye 41:22 ots-aid; fingeri, while a thread or. gimp 4*41for the 'throw' fingenfl; is guided through .eyes tdtiz and. 45? before entering eye, 41,.o'f thensaid 'flhgBI 2.4; All thread-s fromJoff-spools or conesaas usuaku 1 qlt'ispreferredithattthe width of. ribbe'nb {shall be less than the. distance'between the parallel stitchzlinesdd'imd 49 efiect'ed by the neediesj fl and 2|, and lie between them, and it is required that the distance between said stitch line 48 and 49 shall be less than the distance between the parallel feed lines 50 and 5| effected by the throw fingers 23 and 24, and that said stitch lines 48 and 49, shall lie within the lines 50 and 5|.

It is evident that upon axial rotation of shaft 21, the throw fingers 23 and 24 will move, and thereby exchange the paths of th threads 40 and 44, after crossing each of the stitch lines 48 and 49 in reverse order, and over the ribbon 32- between said stitch lines; it being the normal operation of the machine, When the throw fingers23 and 24 so shift their positions that the thread 45 will become engaged by the stitches 52 and 53, and the thread 44 at stitches 54 and 55; thus forming the loops 56 and 51 over the ribbon 32, and the ribbon will appear as if laced through said loops and will lie loose therethrough and remain against the lace or other material 34 sewn An essentialof the present invention, is to permit the creation of such loops 5G and 51, only at definitely, substantially'spaced intervals, which may be either equal or unequal, so that the threads 40 and 44 shall lie along the ribbon 32,

the front of this foot 30,-is mounted a ribbon in free loops 33, while quite a number of functionless stitches 48' and 49 are made along lines 48 and 49, between the formation of the ribbon straddling loops 56 and 51'. To accomplish this, I utilize a cam 58 to control the movement of the shaft 27, whichcam is so designed that its circumferential parts 58" and 58", shall be determined by either equal or unequal central angles, in accordance with the desired relative distances between successive pairs ofloops 56 and 51, and the rate of rotation of said cam 58, is made to be slow relative to a shaft 6| of the machine controlling the stitching along lines 48 and 49, by means of a suitable system of reduction gearing indicated generally by the numeral 62. In the specimen of trimming illustrated, particularly as shown in the magnified figure, the respective lengths of the free loops 33 and 33' are unequal, that is, the cam 58 has caused the actuation of the shaft 21, after four non-functional stitches had been sewn on the lace 34, and then again after the next three non-functional stitches along the stitch lines 48 and 49, and of course, continued operation is in like manner. The loops 33 and 33' may be said to bridge a series of the short stitches, respectively, along the stitch lines 48 and 49.

Said cam 58 is on a stud 63 in the bracket 64,

which is mounted on the frame of the machine 22. A lever 65, on stud 65' in said bracket, i linked at its upper end to arm 28, by means of the member 66, and is provided at its lower end with a cam follower 61, which is maintained against the periphery of the cam by action of a tension spring 68 on said lever.

It is advisable to include the rotating rollers indicated by the numeral 69, for maintaining tautness in the last finished portion of the ribboned lace, for better working of the contrivance, and such rollers may be driven in any suitable manner from any shaft of the machine proper For better decorative effect, the loose ribbon is preferred, but should same be desired to be stitched, it is evident that with the use of a little wider ribbon, such can be readily effected. I may also suggest that the color of all threads and gimps used might be so chosen that all stitching and loops shall appear as if an original part of the lace makeup, and not as a subsequentaddition. v

The operation of ordinary double needle sewing machines equipped with two thread throwing finand that the patent shall cover all patentabie with said threads extending over said ribbon in intersecting relation between said parallel portions thereof, and concurrently forming a. pair of parallel lines of stitching in said fabric intermediate the respective edges of the ribbon and said parallel portions of said threads with certain of said stitches locking said threads at their intersections with said lines of stitching; one or more stitches being between successive locking stitches.

' VICTOR MILSTEIN. 

